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CVE-2025-31691: Drupal OAuth2 Server Missing Authorization vulnerability

April 1, 2025 (updated April 29, 2025)

Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing. This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.

References

  • git.drupalcode.org/project/oauth2_server
  • github.com/advisories/GHSA-4f8q-mwgc-3mwc
  • nvd.nist.gov/vuln/detail/CVE-2025-31691
  • www.drupal.org/sa-contrib-2025-020

Code Behaviors & Features

Detect and mitigate CVE-2025-31691 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →

Affected versions

All versions before 2.1.0

Fixed versions

  • 2.1.0

Solution

Upgrade to version 2.1.0 or above.

Impact 9.8 CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-862: Missing Authorization

Source file

packagist/drupal/oauth2_server/CVE-2025-31691.yml

Spotted a mistake? Edit the file on GitLab.

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